drivers/hid/uhid.c: check write() bitness using in_compat_syscall

uhid changes the format expected in write() depending on bitness. It
should check the syscall bitness directly.

Signed-off-by: Andy Lutomirski <[e-mail]>
Cc: David Herrmann <[e-mail]>
Acked-by: Jiri Kosina <[e-mail]>
Signed-off-by: Andrew Morton <[e-mail]>
Signed-off-by: Linus Torvalds <[e-mail]>

drivers/hid/uhid.c

···
 static int uhid_event_from_user(const char __user *buffer, size_t len,
 				struct uhid_event *event)
 {
-	if (is_compat_task()) {
+	if (in_compat_syscall()) {
 		u32 type;
 
 		if (get_user(type, buffer))